Metal-bending machine.



C. A. JOHNSON.

Patented Nov. 30, 1915.

Em 1 1 02 MM GM N IE DI. NH EN 0 n A TM U P 0! A a l 1 1 II 1 ZNVENTOR.

ATTORNEY.

oHARLEsA. JOHNSON, or 'unioNvILLE, coivivno'rrou'r.

'METAL-VBENDING MACHINE.

Specification of Letters Patent. Patented NOV. 30, 1915.

Application filed March #1, 191 1. Serial No. 615,895.

To all whom it may concern:

Be it known that LCHARLES A. JOHNSON, a citizen of the United States,and a resi-' dent of Unionville, in the county of Hart ford and State ofConnecticut, have invented a new and Improved Metal-Bending Machine, ofwhich the following is a specification. n

Myinvention relates to the, class of devices used to straighten metal inbar, wire or similar form, and the Object of the invention generallyspeaking is to provide a device of this class having novel features ofadvantage and utility.

One form of device embodying my invention and in the construction anduse of which the objects herein set out, together with specific objectsas will hereinafter appear, may be attained is illustrated in theaccompanying drawings, in which- Figure 1 is a view in side elevation ofa machine embodying my invention, one arm of the metal rest being brokenoff. Fig. 2 is a similar view with the metal rest and guide showncomplete but with the straightening lever broken ofi. Fig. 3 is a frontview of the straightening device.

While my invention is not limited to use in connection with any specifickind of apparatus, or in fact with any apparatus sepa rate and apartfrom'itself, yet as it finds ready application in connection with amachine for manufacturing articles from wire I have selected a portionof such a machine as a support to which my improved straightening devicemay be attached.

In the accompanying drawings the numeral 6 indicates a portion of theframe of a machine for producing articles from'metal in bar or wireform. The metal for producing such articles is commonly arranged in acoil from which it is supplied to the machine.

The numeral 7 indicates the base of my improved straightener which maybe senally adjustable in any suitable manner An inverted U-shaped arm orsupport pro jects from said base, the branches 8-9 of this arm formingguides and rests for the strip 10 of metal being straightened. A sleeve11 is located in the branch 8 of the arm, and the branch 9 is providedwith rests 12, and as shown herein these are longitudinally adjustablein any suitable .manner upon the arm 9. In the form of constructionherein shown adjusting screws 13' are employed for moving the rests, andbolts 14 passing through slots 15 are employed to lock'the rests inplace These rests are not absolutely essential to' my invention, but

form a convenient means for guiding the metal which is operated upon." Astraight'-- ener lever is pivotally mounted upon the base 7 this leverconsisting of a cam arm 16 and a straightener arm 17, the latter havinga straightener head 18.

and this head is so arranged that pressure maybe exerted againstopposite sides of the bar 10. The device may be so arranged that thispressure is applied alternately-in opposite directions to opposite sidesof the bar, in

the arrangement herein shown this pressure occurring simultaneously upontwo adjacent sides or edges of the bar, alternately upon opposite edgesor sides of the bar. 7 As a convenient means of regulating theapplication of this pressure, thrust screws 20 may be supported by thehead, the inner or working ends ofthe screws being locatedwithin theopening 19. By this means the point at which the application of force tothebar will cease may be determined to suit different conditions as tosize of stock, qualities as to springiness, etc., this in ordertostraighten the bar by the application of said force.

Whenthe lever is arranged to operate si-- inultaneously on two adjacent' sides or edges of the bar, as shown in Fig. 1, the pivotfor saidlever will be located in proper position preferably to impart the samedegree of pressure simultaneously to the two adjacent sides of the bar.In the preferred arrangement, and as shown herein, this result isaccomplished by locating the head so that its movement will be equalsubstantially on opposite sides of a line arranged at an angle of 45degrees tothe two transverse directions of application of pressure, inthe presentmachine this application of pressure being substantially invertical and horizontal directions. The construction herein shows thecam arm l6 as substantially horizontally arranged and the straightenerarm 17 extends from its pivot at an angle substantially of 45 degrees tothe cam army It will be seen This head has an opening 19 through whichthe bar 10 passes,

that the relative arrangement of the i straightener arm. 17 and rests 12is such that force is applied by the lever diagonally with respect tothe bearing surfaces of'the rest, this term diagonally being employedtodistinguish the operation from one in 1 6is loeatedi This cain slot hasa rise" 2 and a fall 25 in its constructiomtogether.

which the force' might be applied in a line directly against andperpendiculanto' the rests. This lever' iiia rl.-be "oscillated in any Isuitable manner, a satisfactory arrangement including a cam 21 havinga'canr sl'ot2 2 Within which a roller 23Vsecured to the arm with dwells:26. From this construction it will; be noted that simultaneouspressureis. broughtxto bear simultaneously upon the top'edgeand oneisideof-tliefbar 10,- as the,

- lever ismoved in. onedirection 1 by the cam,

and immedia ly ellqwingitherei ,aidwell i he}; nc ei e t. he lev r.ndthe press-i snre will; be brought simultaneously againstv l e. pnoite. dge,.- a d de h r, he p e s Qc u ing ern y;- The dwells ,26 in ,theeam will cause. thelever .to

rest inani-id position, so that as. the bar 10 is ,fed through the headits 5 movement may,

, be, unobstrncted- The bar 1Q may, be fed;

h eh; th tra t ne man al y, o y m t an-ic ls me ns, he-2 er ei g;- any.u t bl qn t ict q t. Ashe ein sh wn, ed; 0 1327 ee et ical y, imtediinen ed; shafts 2.8,- aeco inplish the desired result;

h le have Shown pref i ei r -v o construction embodying aj singlestraight-:-

ener arm 17, invention ,is not limited to such a single arm or e ven toa swinging le ver, and v neither, is it limited to an apparatus inwhich; pressure; is applied, to, the. bar: si multan'eously; orotherwise in transverse directions} or in opposite directions, aspressure applied 'alternately in opposite, directions whether theseopposite directions be transversel onefto the other or. in opposite,direc;

tions in the same use, will embody: the invention,', v i i l i i iinvention contemplates .a structure in which tl ieQpressuref may. beapplied 'from opposite directionsjonly, as by means of the top nnd,blottoinrscrews 20 alone orthe side, -screws. 20 alone. i Neither; doIconteni-H plate, as absolutely, essential toithe invention j a barot'stockin a line diagonally with respect to saidrest, andmeans a:operating sa d member.

2, A mach ne forstra ghten ng metal bars,

including a rest". for, a, bar of stock, a 'pivot- I ally" moi ntedstraightener lever including a stra ghtener arm having contacting faceslocated" at anglesof substantially ninety de-i grees each from theother, the radius of I tacting faces, and means for operating saidlever;

A machine for straightening inetalbars includinga rest fora bar ofstock, apivotally, ino nted, straightener lever, thrust membersremovably located in the straightener lever and havingthein contactingfaces located at, angles of; substantially ninety degreesOneAvithrespeCt, t0 the other, the radiusofsaiddeverbeing locatedyatanangle.

of;- substa itially forty-five degrees with, repe t o s id co tac ig-fac s, ndrmeflne fe operating theJeVer,

at. A machine for straightening metal bars includ ng, a: rest for a bar,of; stock, at

straiglitenenv lever pivotally inountedfalndin- "hid n a, ra g ner r a dp se a pforce tp ,a bar, oiistockin a linediagor nally. with'respect tosaid rest, said lever also including an operatingvarm, means for.

Qnerating the lever.,

machine for straightening metal, bars, includ ng arest for a bar ofstock, a

straightener lever mounted upon a.,s'tationary p vot and ncluding astraightener arm having an opening therethrough thrust screws. arranged;on "diametrically opposite s des otsaid openingto engage ainetalybarpassing through saidlopening, the radius of said straightener, armpassing substantially,

throughithe center of saidfop ening and means for-operating saidrleverrl 6. A machine forstraightening metal bars including. at rest, for a barof, stockincliiding hearing faces located at angles each to the. other,a straightener lever pivotally mounted and disposed to apply a mo, saidbearingfaces in lines diagonally with respect thereto, and means foroperating the hi I i 7. A. machine for straightening metalliarsincluding a. rest for a, bar of stock, a,

straightener lever mounted upon a, fined pivot with its radiusextencling SLlbSttlIl tially through the axis of a ba r supported bysaid restwhereby force is applied to said bar, opposite directions,andlmeansnfor, operatingsaid leverto cause it'to pass to op;

posite sides of said axis.

8 A machine for straighteningmetal bars including a support, rests forabar of stock,

said restsgbeingdisposed to resistforce, in opposite d rections, a straghtener lever dispo sed to' apply force to saidj rests ima di -l rectiondiagonally with respect to their op{ posing surfaces,. and means. for,operating said lever,

9 A- machine for straightening metal bars includinga U-shaped arinhaving openings in its opposite branches, rests fora bar of stockremovably secured to one ofsaid arms on opposite sides of the opening'tlieresaidarm passing at angles of substantially forty-'five-degreesWith-respect to said conthrough, a straightener lever mounted on a fixedpivot with its radius extending substantially through the center of theopening extending between said rests whereby force is applied to saidbar in opposite directions, thrust members secured to said arm insubstantially the same relative position as the rests with respect to abar, and means for operating the lever.

10. A machine for straightening metal bars including a support having anopening for a bar of stock, a straightener lever piv otally mounted andhaving a straightener arm with its radius passing substantially throughthe center of said opening in said support whereby force is applied tosaid bar in opposite directions, a cam arm extending from said pivot inan opposite direction from the straightener arm, and a cam in engagementwith said arm to move the straightening end of the straightener arm onopposite sides of the axis of the opening through said support.

11. A machine for straightening metal bars including a U-shaped arm withopenings for a metal bar in opposite branches thereof, a straightenerlever mounted upon a fixed pivot and including a straightener armextending from the pivot between said branches, straightening memberssecured at the end of said U-shaped arm on opposite sides of the axis ofthe openings therein, the radius of said straightener arm passingsubstantially through the axis of said openings, a cam arm, and a camengaging said arm to operate said straightener lever.

12. A machine for straightening metal barsincluding a U-shaped supporthaving one branch rigidly secured to asupport and the outer end of theopposite branch unsupported and with openings oppositely arranged insaid branches, rests in said branches for a bar of stock, a straightenerlever disposed to apply force diagonally with respect to the opposingfaces of said rests, andmeans for operating the lever.

13. In a machine for straightening metal bars including a support for abar of stock, a pivotally mounted straightener lever, said support beingdisposed to oppose movement of said lever in opposite directions andsaid lever being disposed to apply force to said bar in oppositedirections, and means for operating the lever.

14. A machine for straightening metal bars including a rest for a bar ofstock, a pivotally mounted straightener lever including a straightenerarm having an opening therethrough, thrust screws arranged ondiametrically opposite sides of said openings to engage ametal barpassing through said opening, said thrust screws having their contactingfaces located at angles ofsubstantially ninety degrees one with respectto the other, and the radius of said lever beinglocated at an angle ofsubstantially forty-five degreeswith respect to said contacting faces,and means for operating the lever.

CHARLES A. JOHNSON.

Witnesses:

ARTHUR B. JENKINS, EVA L. STOUGHTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

